Attachment means for control apparatus on engines

ABSTRACT

Attachment means for attaching a fuel control apparatus to an engine comprises formations on the body of the apparatus, engaging complementary formations on the engine or on a part attached thereto, the formations enabling simultaneous mechanical, fuel pipe and/or other connections to be made.

Umted States Patent 1 3,626,916

[72] Inventor Harry Simlster Bottoms [50] Field of Search 123/139,s6111m11, England 127, 139.11.139.1113, 139.13. 139.16, 195 A 21 Appl.NO. 1,977

[22] Filed Jam 2 9 [56] References Cited 45 Patented Dec. 14, 1971UNITED STATES PATENTS Assisnee Joseph Lucas (Industries) Limited2,448,347 8/1948 Beeh 123/139 Birmingham, England 2.929.371 3 1960 123 139 Continuation of application Ser. No. 9 L194 4/196 1 l 2 3 1 9 5 A ,8p 16, 1968, now abandoned- 3,1 19.340 1 H964 Scibbe 123/139. 1 1 13 Thisapplication Jan. 12, 1970, Ser. No. 1,977

[54] ATTACHMENT MEANS FOR CONTROL APPARATUS 0N ENGINES 1 Claim, 4Drawing Figs.

[52] U.S.Cl 123/139, 123/195 A [51] Int. Cl F02d 51/00 PrimaryExaminerLaurence M. Goodridge Attorney-Holman & Stern ABSTRACT:Attachment means for attaching a fuel control apparatus to an enginecomprises formations on the body of the apparatus, engagingcomplementary formations on the engine or on a part attached thereto,the formations enabling simultaneous mechanical, fuel pipe and/or otherconnections to be made.

PATENTEBHEWM 3.626.916

SHET 1 OF 2 E/ZG F 1G4.

INVE NTOR fl 60W ATTORNEYS FATENTEDIJECMM 3,626,916

SHEET 2 OF 2 INV N .242 aid/n4 TOR ATTACHMENT MEANS FOR CONTROLAPPARATUS ON ENGINES This application is a continuation of my priorapplication Ser. No. 721,854 filed Apr. 16, 1968 and now abandoned.

This invention relates to means for attaching fuel control apparatus tointernal combustion engines and has particular, though not exclusive,utility in relation to fuel control apparatus for use on aircraftengines.

The object of the invention is to provide attachment means of the kindreferred to in a convenient form.

In accordance with the present invention attachment means for a fuelcontrol apparatus comprises formations on a body of the controlapparatus engageable with complementary formations on a part on orsecurable to the associated engine, such fonnations enablingsimultaneous mechanical, fuel passage and/or other connections to beaffected as the body and said part are fastened together.

The invention will now be described by way of example with reference tothe accompanying drawings in which:

FIG. 1 illustrates diagrammatically one form of apparatus incorporatingthis invention,

FIG. 2 is a side elevation view of apparatus having the invention, and

FIGS. 3 and 4 are end elevation and side views respectively of a part onthe apparatus of FIG. 2.

The examples illustrated in FIGS. 1 and 2 are intended for use on aninternal combustion engine for a light aircraft, the engine beingindicated at 10.

The engine has attached to it a fuel control apparatus which, in thisexample, includes an engine driven pump, and means for metering thequantity of fuel delivered to the engine, this apparatus being mountedin a single body 1 I.

In order to effect attachment between the body 11 and the engine 10there is, in the FIG. 1 example, a part 12 which is itself secured tothe engine 10, and to which the body 11 is secured in any convenientdetachable manner.

The part 12 has a plurality of external connections which include fuelpipe connections at 13 and 14, air pipes at 15 and 16, and a mechanicalconnection at 17 to an operator's throttle control. The throttle itself,however, is disposed in the body 11, and is indicated generally at 18.

The part 12 also has a connection with the engine 10, whereby the pumpin the body 11 can be driven (this is not illustrated) and if desired,other connections can be made to the part 12, such as electricalconnections.

Between the body 11 and the part 12 are various forms of connectorswhich establish communication between the pipes, mechanical connectionsand passages or apparatus in the body 11. The throttle 18 is connectedwith its external connection 17 on the part 12 through a splined spindle19, which projects from the part 12, to engage in a complementarilysplined portion of the throttle 18. Preferably, the splined shaft 19 isonly capable of engaging with the throttle 18 in one angular position.Other fonns of connection between the throttle and the externalconnection 17 can be substituted if required.

There is a slave shaft 20 which is splined at both ends, which isengageable with the pump in the body 11. This slave shaft 20 isconnected, within the part 12, to an engine driven member (not shown).It is, however, to be understood that other forms of detachable drivingconnection can be provided between the engine and the pump in the body11 through the part 12.

In the example shown in FIG. 1, there is a sealing plate 21 between thepart 12 and the body 1 1, and through this extends a sealed sleeve 22which is carried by the part 12 and is engageable in a bore in the body11 to provide a substantially fluid, tight joint. There is also a faceseal 23 which may be used in combination with the sealing plate 21, oralternatively the latter may be omitted and the face seal may be carriedeither in the part 12 or in the body 11 to engage the opposing surfacewhen the body 11 is secured to the part 12.

Other alternative sealing and connecting arrangements can beincorporated, but in all cases connection between all of them can beachieved simultaneously as the body 11 is moved toward the part 12 toafiect securement thereto.

In the alternative arrangement, shown in FIG. 2, the part 12 is formedintegrally with an appropriate casting of the engine itself, all theexternal connections are made to the engine in a manner not shown.

FIGS. 3 and 4 show a part 24 which is connected to the body 11 by meansof a central screw engaging in a hole 25. This part 24 is of disc likeform and has bonded to one face a sealing plate 26. The part 24 has ahole 27 for reception of a driving shaft (not shown) from the engine 10and a further set of holes 28, which are fuel supply passages. Thereare, as in the FIG. 1 constructions, complementary formations on theapparatus 11 and the engine 10 respectively.

It will be seen that this arrangement enables rapid maintenance and/ortesting of the fuel control apparatus of the body 1 l to be accomplishedwithout disturbance of any of the external connections, which arerequired to the apparatus.

I claim:

1. In an internal combustion engine having a fuel control unit andattachment means between the fuel control unit and the engine, saidattachment means including a part secured to the engine and securable tothe fuel control unit, said part having a plurality of internal passagesfor fuel and air, said internal passages terminating at one end inexternal exposed connections for fuel and air lines and terminating attheir opposite end at apertures in a plane surface forming a mountingface for a complementary shaped face on the fuel control unit, said fuelcontrol unit having corresponding passages terminating in apertures inthe mounting face in registry with those in said part, said part havingat least one external mechanical linkage engaged with mechanicalconnecting means in said part which is engageable with a mechanicaldevice in the fuel control unit, means for removably securing the fuelcontrol unit to said part whereby said passages and mechanical devicebecome simultaneously operably connected to afford connection betweenthe fuel and air lines and the mechanical linkage respectively, and asingle separate sealing means disposed between the mounting faces toprevent leakage between passages.

1. In an internal combustion engine having a fuel control unit andattachment means between the fuel control unit and the engine, saidattachment means including a part secured to the engine and securable tothe fuel control unit, said part having a plurality of internal passagesfor fuel and air, said internal passages terminating at one end inexternal exposed connections for fuel and air lines and terminating attheir opposite end at apertures in a plane surface forming a mountingface for a complementary shaped face on the fuel control unit, said fuelcontrol unit having corresponding passages terminating in apertures inthe mounting face in registry with those in said part, said part havingat least one external mechanical linkage engaged with mechanicalconnecting means in said part which is engageable with a mechanicaldevice in the fuel control unit, means for removably securing the fuelcontrol unit to said part whereby said passages and mechanical devicebecome simultaneously operably connected to afford connection betweenthe fuel and air lines and the mechanical linkage respectively, and asingle separate sealing means disposed between the mounting faces toprevent leakage between passages.